A few years ago, I posted a recipe for vegetable broth. It wasn’t even based on my own. I used a cookbook as a guide and bought vegetables specifically to make broth.
Do you know how ridiculous that was? At some point since then, I ran across this idea for a broth bag.
What you do is save all the ends, peels, etc. when you cut up vegetables (avoiding starchy things like potatoes) and throw them in a big Ziploc bag that lives in your freezer.